crane



UNTED .STATES PATENT OFFICE.

PERRY PUTNAM AND JOHBv E. CRANE-OE LOWELL, AMASSAC1[USE'.I."IS.

TENONING-MACHINE.

Specification of Letters Patent No. 18,212, dated September 15, 1857.

To all whom it maywncem:

Be it known that we, 'PERRY PUTNAM and J oi-IN E. CRANE, both of Lowell, in the county of Middlesex and Commonwealth of Hassachusetts, .have invented certain new and useful Improvements in Tenoning-Machines; and we `do hereby vdeclare `that the following is a full, clear, and eXact description of the construction and operation of the same,reference being had to the annexed drawings, -making a part of this specification, in which- Figure 1 is a plan or top view of our machine. Fig. 2 is a front elevation. Fig. 3 is a transverse vertical section through the middle of the machine; and Fig. 4 is a detached view of the feeding frame.

Similar letters of reference in each of the several figures indicate like parts.

A, represents the frame.

B, is the main shaft giving motion to all the working parts of the machine.

The machine may be said to consist of three parts, the first part being a stationary head carrying two adjustable cutters, the second part being a movable head with similar cutters, and the third part being a selffeeding adjustable table or frame situated between the two heads, which supports and feeds along to the cutters, the wood or stuff to be tenoned.

C is a pulley fastened to the shaft B, which by means of the band D, gives motion to the cutters E and F in the stationary head. A binder pulley G, hung in the end of a weighted lever (g) preserves the proper tightness of the belt. Each cutter is hung in a separate frame and is adjustable by screws on the head block H.

C', is a pulley secured to shaft B, by means of a spline, which allows the pulley to be moved lengthwise of the shaft, whenever the cutter head is moved, it being connected to the cutter head by means of a forked arm which is received in a groove in the hub of the pulley. By means of the band D', pulley C' gives motion to the cutters E and F' in the movable head, and the binder G' keeps the belt at proper tension. The cutters used are similar to those in general use for the purpose, and they are on a line with each other so that their action may be simultaneous.

The stuff or pieces to be operated upon may be piled upon the table as shown at ,nerz-A pulley AK, on the shaft B,by means a :band L, pulley Mand Vgears il and (9, `gives motion lto -the cam shaft P. On this shaft is a cam Q that at-'each revolution,

drives a lever R, which is connected by :means of a'set screw S, to the rod T of the feeding frame. V, V', are adj ustabledrivers vfastened to vone end of the feeding frame vby Imeans of set screws. They `project above the general llevel ofthe feeding frame, so that :as `the-.frame-moves forward theycatch and drive the lowest piece, from the pile of stuff, a certain distance toward the cutters. The pile, as soon as the lowest piece is removed falls upon the top of the drivers. The frame is now moved in the opposite direction, leaving the first piece where it happened to be-which depends upon the width of it-thus carrying the drivers back until they are clear of the pile, when the stuftl drops in front of the drivers upon the frame. Then as the cam revolves, it drives the feeding frame forward again-taking another piece from the pile, which piece will come in contact with the one that preceded it, and will move that along until the drivers go back for a third piece and bring it up to move the two along as the second did the first, and so the operation is repeated as long as there is material supplied to the pile, and when the last piece of the pile is moved forward by the drivers, the feeding frame may be pushed by hand farther along than it usually goes, so as to carry that piece completely past the cutters.

Z, Z, are adjustable horizontal guides to regulate the width of the tenon and to keep the stuff in place as it is driven forward.

el, cl', are springs to press the stuff upon the top of the guides U, U', and prevent its rising, as it passes between the cutters.

If a lot of narrow pieces are to be tenoned the frame is fastened to the lever R so that the drivers V, V', shall be near the cutters; if broad pieces, then it is fastened so that the drivers shall be farther off from the cutters. This feeding frame is supported in guides U, U', fastened, one to the stationary head, the other,to the movable head; and on top of these guides the pieces slide along as they are fed to the cutters by the feeding frame. If the pieces are shorter than those represented, there is an apparatus for bringing the movable head nearer to the stationary one, and at the same time contract the width of the feeding frame to correspond thereto.

X, is a long screw extending from head to head, with a crank "W secured to one end, one end being confined to the stationary head, the other, or screw end, draws the movable head toward it, and the feeding frame being connected to the movable head, is contracted by it, and as the rod T moves with the frame it takes along with it, the lever R, and also the fulcrum bar Y with which it is connected. The bar Y is provided with a forked arm that fits a groove in the hub of the cam Q, and as the cam Q is splined to the shaft P, it is made to move lengthwise of it as far as rod T goes. By turning the crank in the oppositedireotion, the cutter head, pulley, feeding frame, and cam are all returned to their first position.

In Fig. 4, we have shown a detached view of the feeding frame, in which (a, a) are two parallel bars with slots in them. These bars are connected together by jointed straps (b, Z), c, 0,) and the straps are also oonneoted to the central rod T by joints so that when the two bars (a, a) are pressed toward or drawn from each other, they will always be parallel, and the central rod T will always be at an equal distance from each bar, and parallel to both.

Having thus described our invention we do not claim the parts of our machine separately, but their arrangement and operation specifically as described, and for the purposes set forth.

In witness whereof we have hereunto set our signatures this fourteenth day of August, A. D. 1857.

PERRY PUTNAM. JOHN E. CRANE.

In presence of us: ELIPT. HILLS, H. P. FAIRFIELD. 

